Use is<>() / downcast<>() for RenderBox
Created attachment 239995 [details] Patch
Created attachment 239996 [details] Patch
Comment on attachment 239996 [details] Patch r=me
Comment on attachment 239996 [details] Patch Clearing flags on attachment: 239996 Committed r174840: <http://trac.webkit.org/changeset/174840>
All reviewed patches have been landed. Closing bug.